Super austenitic stainless steel welding technology and subsequent heat treatment process thereof

Abstract

The invention discloses a super austenitic stainless steel welding technology; the welding technology comprises the following steps: (1) selecting a super austenitic stainless steel sheet; (2) selecting an SFA5.14-ERNiCrMo-3 welding wire to carry out multilayer pass welding on the super austenitic stainless steel sheet at a 1G horizontal position by a tungsten argon arc welding method, wherein interlayer-temperature is lower than 80 DEG C; (3) adopting a direct current (DC) power supply during welding, wherein polarity is welding wire connection, the specification of the welding wire is phi 1.2mm, welding current is 90-110A, welding voltage is 16-20V, welding speed is 100-120mm / min, protective gas in a welding gun and at the back of the welding gun is Ar gas, and the purity of the Ar gas is more than 99.997 percent. According to the super austenitic stainless steel welding technology and a subsequent heat treatment process of the welding technology, welding steps and post-weld heat treatment steps are simpler, and the post-weld super austenitic stainless steel sheet is enabled to be high in firmness, not to be easily bended and not to easily have cracks, so that the corrosion resistance of the super austenitic stainless steel sheet is guaranteed.

Description

technical field [0001] The invention relates to a stainless steel welding process, in particular to a super austenitic stainless steel welding process and subsequent heat treatment process. Background technique [0002] Super austenitic stainless steel, like other commonly used Cr-Ni austenitic steels, has good cold and hot workability, but the welding and post-weld heat treatment steps of super austenitic stainless steel are relatively cumbersome and the properties after welding are relatively Poor, easy to bend after welding, prone to cracks and reduced corrosion resistance. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a super austenitic stainless steel welding process and subsequent heat treatment process. [0004] To achieve the above object, the technical scheme of the present invention is as follows: [0005] A super austenitic stainless steel welding process is characterized in that the welding p...

AI Technical Summary

Problems solved by technology

[0002] Super austenitic stainless steel, like other commonly used Cr-Ni austenitic steels, has good cold and hot workability, but the welding and post-weld heat treatment steps of super austenitic stainless steel are relatively cumbersome and the properties after welding are relatively Poor, easy to bend after welding, prone to cracks and reduced corrosion resistance

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